I always wonder in these cases where idiots lash out denying climate change that deep down they do it as a coping mechanism, because if they accepted it exists it would quickly weigh down on them how fucked up our environment is.
By denying it they don't have to think about the world about to go to shit. Maybe that's why people still have kids.
These people are so deranged that if they have a single value overlap with "the libs" they lose their shit. If they can't be polar opposites they don't know how to handle it
I remember talking to an adult about religion when I was in high school, and they straight up told me, "the only reason people are nice to each other is so they can get into heaven, without Jesus, there is no motivation for people to be kind, so we have to spread the gospels."
I was horrified, but all of a sudden, my understanding of the world view for a lot of people just clicked into place
I thought it was going to be a "science" documentary about flat earth. But it actually turned into more of a psychology documentary and is a tiny bit similar to what you are talking about. Why they believe and don't change their mind.